Quarter	US dollars
1999-03-31	2214
1999-06-30	2289
1999-09-30	2650
1999-12-31	2070
2000-03-31	2217
2000-06-30	2215
2000-09-30	2251
2000-12-31	2447
2001-03-31	2468
2001-06-30	2623
2001-09-30	2916
2001-12-31	3890
2002-03-31	4408
2002-06-30	4665
2002-09-30	3383
2002-12-31	3667
2003-03-31	3723
2003-06-30	3803
2003-09-30	3544
2003-12-31	3609
2004-03-31	3869
2004-06-30	3824
2004-09-30	4111
2004-12-31	4017
2005-03-31	4273
2005-06-30	4400
2005-09-30	9044
2005-12-31	9411
2006-03-31	9839
2006-06-30	9859
2006-09-30	9898
2006-12-31	10129
2007-03-31	9978
2007-06-30	9852
2007-09-30	9963
2007-12-31	9972
2008-03-31	10121
2008-06-30	9899
2008-09-30	7754
2008-12-31	5184
2009-03-31	5796
2009-06-30	5745
2009-09-30	7566
2009-12-31	7370
2010-03-31	8055
2010-06-30	8010
2010-09-30	8019
2010-12-31	8652
2011-03-31	8897
2011-06-30	7754
2011-09-30	7868
2011-12-31	7241
2012-03-31	5277
2012-06-30	4296
2012-09-30	4321
2012-12-31	4736
2013-03-31	3775
2013-06-30	4185
2013-09-30	3979
2013-12-31	4795
2014-03-31	5506
2014-06-30	5682
2014-09-30	6304
2014-12-31	6359
2015-03-31	7188
2015-06-30	8724
2015-09-30	8211
2015-12-31	5505
2016-03-31	4368
2016-06-30	2780
2016-09-30	3289
2016-12-31	4479
2017-03-31	5312
2017-06-30	4296
2017-09-30	4477
2017-12-31	4627
2018-03-31	6511
2018-06-30	5850
2018-09-30	5501
2018-12-31	3690
2019-03-31	2952
2019-06-30	4085
2019-09-30	4129
2019-12-31	4796
2020-03-31	4902
2020-06-30	4598
2020-09-30	4780
2020-12-31	4743
2021-03-31	5007
2021-06-30	6544
2021-09-30	7066
2021-12-31	8955
2022-03-31	10171
2022-06-30	13172
2022-09-30	13072
2022-12-31	12869
2023-03-31	13033
2023-06-30	13900
2023-09-30	12733